Plating plant in the use of alkaline copper brightener, the tank solution has impurities should be how to deal with? In this issue, we will analyze the article.
(1) Zinc impurities in the plating solution higher than 0.1 g / L, will make the plating color dark, there are streaks appear, when the alkaline copper plating solution zinc content reaches 1.5 ~ 2.5 g / L, it will be plated with brass-colored plating layer. Zinc impurities can also be treated by cathodic electrolysis at 0.3~0.5 A/dm² current density. Since zinc cyanide-ligand compounds and copper cyanide-ligand compounds have similar deposition potentials, they can easily become alloy precipitation, and the loss of copper is relatively large, so the engineers at Bigelow do not recommend electrolysis, and the concentration of zinc impurities should be allowed to drop by itself with the normal production of electroplating and be removed slowly.
(2) The presence of 0.015~0.030 g/L lead ions can make the cyanide copper plating layer easy to shine, so some plating masters will prepare their own lead salts as brighteners, and the content is high, and it does achieve a certain effect in the beginning.
But using this lead salt additive for a long time will cause the lead ions in the bath to accumulate gradually as well, and when it exceeds 0.08 g/L, it will make the plating layer rough and brittle. Therefore, we suggest using Bigely alkaline copper brightener Cu-201, which is a commercialized brightener, and the plating layer is made with detailed crystallization and low porosity. Moreover, because it is developed by a team of engineers, both the ratio and the composition have been tested in the large-scale production, which helps to guarantee the stability of the plating layer quality, and will not affect the plating layer after a long period of time.
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Guangdong Bigely Technology Co., Ltd. ,founded in 2003, is a high-tech enterprise integrating R & D，production, sales and service, specializing in the production of electroplating chemicals. As a fast growing electroplating chemicals supplier in China, Bigely Technology is a national high-tech enterprise with a strong research and development team, which has over 10 engineers with more than 20 years' working experience in the electroplating industry.
If you need our high-quality electroplating additives, please contact us. We can provide you samples for test, and also provide a series of services.
